<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
        <form th:action="@{/lalapage}" method="get">
            <input name="username">
            <button type="submit">一键登录</button>
        </form>
        <a th:href="@{/whoiam}">我是谁</a>

        <h1>[[${msg}]]</h1>
</body>
</html>